The savings are theoretical; the risks are guaranteed. For the cost of one ransomware cleanup, you could buy a legitimate Dolibarr 19 license plus five premium modules for a decade.
Nulled modules are often modified by hackers to include backdoors. This allows unauthorized access to your Dolibarr database, potentially exposing customer data, financial records, and login credentials. System Instability and Crashes: Dolibarr Modules Nulled And 11